Toilet tissue storage rack



FIG. 1 is a top, front, and left side perspective view of a toilet tissue storage rack showing my new design;

FIG. 2 is an enlarged top plan view thereof;

FIG. 3 is an enlarged bottom plan view thereof;

FIG. 4 is an enlarged rear elevational view thereof; and,

FIG. 5 is an enlarged right side elevational view thereof. 

The ornamental design for a toilet tissue storage rack, as shown. 